# Period

- The time taken for a full cycle of motion in a system executing harmonic motion. If the motion is at a single frequency f (i.e. sinusoidal) the period T is given by:
*where**T*= period [s]*f*= frequency [Hz]- ω = angular velocity [rads
^{-1}]

The period of a periodic waveform is the inverse of its fundamental frequency.

Moon orbiting the earth | 2.37x10^{6}s = 27.4 days |

Human heart beat | ~1.5s |

Camera shutter | 0.001s to 1s |

**See also: **Angular Velocity, Frequency, Wavelength.

**Subjects: ** Noise & Vibration Physics